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==Overview==
==Overview==
Laboratory findings consistent with the diagnosis of psoriasis include parakeratosis, vascular dilation, spongiform pustules of Kogoj and Munro's microabscesses on hemotoxylin and Eosin staining of an affected area of skin. ELISA may show increased levels of Long Pentraxin 3 perotein (PTX3). Complement levels may be increased.
Laboratory findings consistent with the diagnosis of psoriasis include increased levels of Long Pentraxin 3 protein (PTX3) and elevated [[Complement|complement levels]].


==Laboratory Findings==
==Laboratory Findings==


=== Biopsy<ref name="pmid18251745">{{cite journal |vauthors=Werner B, Bresch M, Brenner FM, Lima HC |title=Comparative study of histopathological and immunohistochemical findings in skin biopsies from patients with psoriasis before and after treatment with acitretin |journal=J. Cutan. Pathol. |volume=35 |issue=3 |pages=302–10 |year=2008 |pmid=18251745 |doi=10.1111/j.1600-0560.2007.00800.x |url=}}</ref> ===
=== Enzyme linked immunosorbent assay (ELISA) ===
On Hemotoxylin and Eosin (H&E) stain the following findings may be observed:
* In patients with severe psoriasis, increased levels of Long Pentraxin 3 protein (PTX3) can be observed in [[plasma]] and in [[monocytic]] cultures by [[Enzyme linked immunosorbent assay (ELISA)|enzyme linked immunosorbent assay]] (ELISA).<ref name="pmid16865225">{{cite journal |vauthors=Bevelacqua V, Libra M, Mazzarino MC, Gangemi P, Nicotra G, Curatolo S, Massimino D, Plumari A, Merito P, Valente G, Stivala F, La Greca S, Malaponte G |title=Long pentraxin 3: a marker of inflammation in untreated psoriatic patients |journal=Int. J. Mol. Med. |volume=18 |issue=3 |pages=415–23 |year=2006 |pmid=16865225 |doi= |url=}}</ref>
* Perivascular and dermal inflammatory cell infiltration.
* Vascular dilation
* Absent granular layer
* Elongation of dermal papillae
* Parakeratosis
* Spongiform pustules of Kogoj (Pathognomic of psoriasis)
* Munro's microabscesses (Pathognomic of psoriasis)
* edema of dermal papillae


* In psoriasis, skin biopsy of the affected area of skin shows that the epidermal/suprapapillary thickness ratio is increased.
=== Serum complement levels ===
* Basal cell layer is expanded
The following abnormalities of [[Complement|serum complement]] levels may be observed in cases of psoriasis:<ref name="pmid6159678">{{cite journal |vauthors=Vinje O, Møller P, Mellbye OJ |title=Laboratory findings in patients with psoriasis, with special reference to immunological parameters, associations with arthropathy and sacro-iliitis |journal=Scand. J. Rheumatol. |volume=9 |issue=2 |pages=97–105 |year=1980 |pmid=6159678 |doi= |url=}}</ref>  
 
* Increased serum [[Immunoglobulin A|IgA]]
=== Enzyme linked immunosorbent assay (ELISA)<ref name="pmid16865225">{{cite journal |vauthors=Bevelacqua V, Libra M, Mazzarino MC, Gangemi P, Nicotra G, Curatolo S, Massimino D, Plumari A, Merito P, Valente G, Stivala F, La Greca S, Malaponte G |title=Long pentraxin 3: a marker of inflammation in untreated psoriatic patients |journal=Int. J. Mol. Med. |volume=18 |issue=3 |pages=415–23 |year=2006 |pmid=16865225 |doi= |url=}}</ref> ===
* Increased [[C3 (complement)|C3]] in phalyngeal [[arthropathy]] associated with psoriasis
* In patients with severe psoriasis increased levels of Long Pentraxin 3 protein (PTX3) are found in plasma and in monocytic cultures by enzyme linked immunosorbent assay (ELISA).
* Increased [[Complement|C4]]
 
* Increased C3PA concentrations
=== Serum complement levels<ref name="pmid6159678">{{cite journal |vauthors=Vinje O, Møller P, Mellbye OJ |title=Laboratory findings in patients with psoriasis, with special reference to immunological parameters, associations with arthropathy and sacro-iliitis |journal=Scand. J. Rheumatol. |volume=9 |issue=2 |pages=97–105 |year=1980 |pmid=6159678 |doi= |url=}}</ref> ===
* Increased [[C-reactive protein|CRP]] concentration in [[sacroiliitis]] associated with psoriasis
* Increased serum IgA.
* Increased C3 in phalyngeal arthropathy associated with psoriasis.
* Increased C4.
* Increased C3PA concentrations.
* Increased CRP concentration in sacro-iliitis associated with psoriasis.


==References==
==References==
{{Reflist|2}}
{{Reflist|2}}
{{WH}}
{{WS}}


[[Category:Primary care]]
[[Category:Dermatology]]
[[Category:Dermatology]]
[[Category:Needs content]]
[[Category:Disease]]
{{WH}}
{{WS}}

Latest revision as of 23:52, 29 July 2020

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Syed Hassan A. Kazmi BSc, MD [2]

Overview

Laboratory findings consistent with the diagnosis of psoriasis include increased levels of Long Pentraxin 3 protein (PTX3) and elevated complement levels.

Laboratory Findings

Enzyme linked immunosorbent assay (ELISA)

Serum complement levels

The following abnormalities of serum complement levels may be observed in cases of psoriasis:[2]

  • Increased serum IgA
  • Increased C3 in phalyngeal arthropathy associated with psoriasis
  • Increased C4
  • Increased C3PA concentrations
  • Increased CRP concentration in sacroiliitis associated with psoriasis

References

  1. Bevelacqua V, Libra M, Mazzarino MC, Gangemi P, Nicotra G, Curatolo S, Massimino D, Plumari A, Merito P, Valente G, Stivala F, La Greca S, Malaponte G (2006). "Long pentraxin 3: a marker of inflammation in untreated psoriatic patients". Int. J. Mol. Med. 18 (3): 415–23. PMID 16865225.
  2. Vinje O, Møller P, Mellbye OJ (1980). "Laboratory findings in patients with psoriasis, with special reference to immunological parameters, associations with arthropathy and sacro-iliitis". Scand. J. Rheumatol. 9 (2): 97–105. PMID 6159678.

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